﻿using ReferenceTemplate.Models;
using ReferenceTemplate.Windows8.Common;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Threading.Tasks;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Networking.Connectivity;
using Windows.UI.Popups;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// The Basic Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234237

namespace ReferenceTemplate.Windows8
{
    /// <summary>
    /// A basic page that provides characteristics common to most applications.
    /// </summary>
    public sealed partial class DetailPage : Page
    {

        private NavigationHelper navigationHelper;
        private ObservableDictionary defaultViewModel = new ObservableDictionary();
        private bool IsConectivityAvailable = true;
        
        /// <summary>
        /// This can be changed to a strongly typed view model.
        /// </summary>
        public ObservableDictionary DefaultViewModel
        {
            get { return this.defaultViewModel; }
        }

        /// <summary>
        /// NavigationHelper is used on each page to aid in navigation and 
        /// process lifetime management
        /// </summary>
        public NavigationHelper NavigationHelper
        {
            get { return this.navigationHelper; }
        }


        public DetailPage()
        {
            this.InitializeComponent();
            this.navigationHelper = new NavigationHelper(this);
            this.navigationHelper.LoadState += navigationHelper_LoadState;
            this.navigationHelper.SaveState += navigationHelper_SaveState;
            IsConectivityAvailable = IsInternetAvailable();

            if(!IsConectivityAvailable)
            {
                var task = this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () => ShowErrorConectivity());
            }
            NetworkInformation.NetworkStatusChanged += NetworkInformation_NetworkStatusChanged;
        }

        /// <summary>
        /// Populates the page with content passed during navigation. Any saved state is also
        /// provided when recreating a page from a prior session.
        /// </summary>
        /// <param name="sender">
        /// The source of the event; typically <see cref="NavigationHelper"/>
        /// </param>
        /// <param name="e">Event data that provides both the navigation parameter passed to
        /// <see cref="Frame.Navigate(Type, Object)"/> when this page was initially requested and
        /// a dictionary of state preserved by this page during an earlier
        /// session. The state will be null the first time a page is visited.</param>
        private void navigationHelper_LoadState(object sender, LoadStateEventArgs e)
        {
        }

        /// <summary>
        /// Preserves state associated with this page in case the application is suspended or the
        /// page is discarded from the navigation cache.  Values must conform to the serialization
        /// requirements of <see cref="SuspensionManager.SessionState"/>.
        /// </summary>
        /// <param name="sender">The source of the event; typically <see cref="NavigationHelper"/></param>
        /// <param name="e">Event data that provides an empty dictionary to be populated with
        /// serializable state.</param>
        private void navigationHelper_SaveState(object sender, SaveStateEventArgs e)
        {
        }

        #region NavigationHelper registration

        /// The methods provided in this section are simply used to allow
        /// NavigationHelper to respond to the page's navigation methods.
        /// 
        /// Page specific logic should be placed in event handlers for the  
        /// <see cref="GridCS.Common.NavigationHelper.LoadState"/>
        /// and <see cref="GridCS.Common.NavigationHelper.SaveState"/>.
        /// The navigation parameter is available in the LoadState method 
        /// in addition to page state preserved during an earlier session.

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            navigationHelper.OnNavigatedTo(e);

            //Links.Loaded += (a,args) =>
            //{
            //    //Links.SelectedItem = (Link)e.Parameter;
            //    Links.SelectedItem = Links.Items.Where(item => ((Link)item).Id.Equals(e.Parameter)).FirstOrDefault();
            //};
        }

        protected override void OnNavigatedFrom(NavigationEventArgs e)
        {
            navigationHelper.OnNavigatedFrom(e);
        }

        #endregion

        #region Deteccion de Red
        private bool IsInternetAvailable()
        {
            var internetProfile = NetworkInformation.GetInternetConnectionProfile();
            return internetProfile != null &&
                internetProfile.GetNetworkConnectivityLevel() ==
                NetworkConnectivityLevel.InternetAccess;
        }

        void NetworkInformation_NetworkStatusChanged(object sender)
        {
            var now = IsInternetAvailable();
            if (IsConectivityAvailable && !now)
            {
                IsConectivityAvailable = false;
               
                var task = this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>  ShowErrorConectivity());
                
            }
            else if (!IsConectivityAvailable && now)
            {
                IsConectivityAvailable = true;
            }
        }

        async void ShowErrorConectivity()
        {
            MessageDialog message = new MessageDialog("La aplicación necesita internet para mostrar el contenido de las webs. Si no hay internet no tendrás acceso al contenido.", "No hay conexión a Internet");
            await message.ShowAsync();
        }
        #endregion
    }
}
